This can't be repeated often enough: do NOT use your daily computer for crypto wallet stuff, especially when you're using Windows!

Get a cheap used laptop; install latest firmware¹; wipe storage and install a Linux distro; avoid browsing funky websites with this machine, it's OK to visit mempool.space with it; avoid reading your mails on this device; avoid installing browser extensions on installed browsers; avoid to install or experiment with software on this device; install only the very minimum and necessary software to verify genuine wallet software or anything you might need for using a hardware wallet.

Always, without exception from beginning until the latest update, verify wallet software that it's genuine and download only from verified genuine source. Do not trust search engine query results as top hits may be paid hits by attackers.

Electrum: https://electrum.org
Sparrow: https://sparrowwallet.com/
Bitcoin Core: https://bitcoincore.org   ---   bitcoin.org isn't the primary site for Bitcoin Core



[1] If it's on latest firmware, check if you can downgrade to previous firmware and re-apply latest firmware. This should ensure that your BIOS firmware isn't tampered.